The Collaborative International Dictionary
Saxicavae
Saxicava \Sax`i*ca"va\, n.; pl. E. saxicavas, L. Saxicav[ae]. [NL. See Saxicavous.] (Zo["o]l.) Any species of marine bivalve shells of the genus Saxicava. Some of the species are noted for their power of boring holes in limestone and similar rocks.
Wiktionary
saxicavae
n. (plural of saxicava English)